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I/172/irs International Reference Stars (IRS) (Corbin 1991)
International Reference Stars (IRS), parts 1 (more reliable) and 2 (less reliable) (36027 rows)
  recno=27337
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ColumnValue  Explain   (UCD)
_RAJ200022 31 41.32969 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000-10 54 20.1531 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195022 29 02.33367 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950-11 09 44.7361 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon052.39046795 deg Galactic longitude at Epoch=J1950, proper motions taken into account (pos.galactic.lon)
_Glat-53.38615935 deg Galactic latitude at Epoch=J1950, proper motions taken into account (pos.galactic.lat)
27337recno 27337  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

p1   [1,2] Catalog Part number: 1=more reliable, 2=stars with poor observational history (meta.id;meta.main)
IRS 27337  (i) [1/76865] IRS sequential number (Note)   (meta.record)
RAB195022 29 02.333 "h:m:s" (i) Hours RA, equinox=B1950, Epoch=B1950.0 (pos.eq.ra;meta.main)
e_RAB1950 4 ms Mean error in RA at original epoch (stat.error;pos.eq.ra)
w_RAB1950 7.4  Sum of the weights in RA (stat.weight)
DEB1950-11 09 44.74 "d:m:s" (i) Degrees Dec, equinox, epoch B1950.0 (pos.eq.dec;meta.main)
e_DEB1950 5 10mas Mean error in Dec at original epoch (stat.error;pos.eq.dec)
w_DEB1950 9.2  Sum of the weights in DE (stat.weight)
pmRA 5.00 ms/yr RA proper motion, FK4 system (pos.pm;pos.eq.ra)
e_pmRA 0.21 ms/yr Mean error on pmRA (stat.error;pos.pm;pos.eq.ra)
pmDE -37.4 mas/yr DE proper motion, FK4 system (pos.pm;pos.eq.dec)
e_pmDE 2.4 mas/yr Mean error on pmDE (stat.error;pos.pm;pos.eq.dec)
EpRA1933.013 yr Original epoch of RA (epoch of mean position) (time.epoch)
EpDE1929.878 yr Original epoch of DE (epoch of mean position) (time.epoch)
o_RAB1950 15  Number of positions in RA (meta.number)
o_DEB1950 16  Number of positions in DE (meta.number)
Pmag 7.30 mag [520/1000] Photographic magnitude (phot.mag;em.opt)
SpTF0  Spectral type (src.spType)
BD-11 5855  Bonner Durchmusterung number I/122 (meta.id)
CD   Cordoba Durchmusterung number I/114 (meta.id)
CP   Cape Photographic Durchmusterung I/108 (meta.id)
AGK3   AGK3 number I/61 (meta.id)
CPC2017472  Second Cape Photograpic Catalog I/85 (meta.id)
IRSJJ223141.33-105420.1  IRS number, IRS Jhhmmss.ssSddmmss.s (Note)   (meta.id)
RA200022 31 41.337 "h:m:s" Hours RA, Equinox=J2000, Epoch=J2000 (Note)   (pos.eq.ra)
pmRA2000 5.22 ms/yr Centennial RA proper motion, J2000.0 (pos.pm;pos.eq.ra)
EpRA-J2000-66.987 yr Original epoch - J2000.0 in RA (time.epoch;pos.eq.ra)
DE2000-10 54 20.11 "d:m:s" Degrees Dec, equinox, epoch J2000.0 (pos.eq.dec)
pmDE2000 -40.3 mas/yr Centennial Dec proper motion, J2000.0 (pos.pm;pos.eq.dec)
EpDE-J2000-70.122 yr Original epoch - J2000.0 in DE (time.epoch;pos.eq.dec)

_RA.icrs22 31 41.330 "h:m:s" (i) Right ascension (ICRS) at Epoch=J2000, proper motions taken into account (computed by VizieR, not part of the original data) (pos.eq.ra)
_DE.icrs-10 54 20.153 "d:m:s" (i) Declination (ICRS) at Epoch=J2000, proper motions taken into account (computed by VizieR, not part of the original data) (pos.eq.dec)
  
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